The "Sound Plate™" automatically positions the call in your mouth at the right place and angle, making calling elk easier. The Sentry Plate™ Single has a "Sound Plate™" set at 16 degrees, which is perfect for cow, calf talk and spike bull bugles. Features: The angle of this sound plate is set at 16 degrees, making this single-reed call prefect for cow, calf, and spike bull sounds without switching calls. US Patent Nos. 5,415,578 & 5,520,567.
; "Primos Sentry Plate™ Single Elk Call")